Due to high dust counts in BSC-9 on Tuesday 7-29, there was an early morning cleaning of the chamber this morning. The chamber was wipe as you go cleaned on the way into the chamber and again on the way out. Particle counts were taken before, during, and after the work. The stairs leading into the chamber were also wiped down.  

Description                           0.3  0.5  1.0
In cleanroom cover on           79   27    3
In chamber cover on             26   17    6
In chamber cover 1/2 open    83   44    8

In chamber first cleaning         215  121   26
In chamber second cleaning   267  121   56

In chamber cover 1/2 open      505  245   60
In cleanroom cover on             19    8    1
In chamber cover on +5 min     201   98   27